For this tutorial, I will be using the PHP LESS implementation by Leaf Corcoran. This implementation is only one of many and the principles discussed in this tutorial should apply to any LESS implementation. Other versions of LESS include the original Ruby version and a JavaScript implementation.

Start by downloading the latest version of LESS. After you extract the file, you should have a 'lessphp' folder. Inside you will find a file called 'less.inc.php': that's the one we want. Take this file and place it in your site's CSS folder.